Harrow-tooth fastening.



No. 7l4,66| Patented Dec. 2, I902.

G. E. BLMNE',

HABROW TOOTH FASTENlNG.

(Appiication filed. Aug.- 28, 1902.)

(N0 Model.)

m: nouns PETERS co. PNOTO-LITHQ. wnsumumn n c UNITED TATES ATENT OFFICE.

GEORGE E. BLAINE, OF DECATUR, ILLINOIS.

HARROW-TOOTH FASTENING.

SPEGIFICATION forming part of Letters Patent No. 714,661, dated December 2, 1902.

Application filed August 28, 1902- Serial No. 121,344. (No model.

To all whom it may concern.-

Be it known that I, GEORGE EPBLAINE, a citizen of the United States, residing at Decatur, in thecounty of Macon and State of Illinois, have invented certain new and useful Improvements in Harrow-Tooth Fastenings; and I do declare the following to be a full, clear, and exact description of the invention, such as willenabie others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in barrow-tooth fastenings.

The object of the invention is to provide a simple and effective construction of connection between the tooth and its support, where by the tooth is fitted in and firmly secured to the support Without the use of auxiliary or extraneous fastenings.

With this and other objects in view the invention consists of certain novel features of construction, combination, and arrangement of parts, which will be hereinafter more fully described, and particularly pointed out in the appended claims.

In the accompanying drawings, Figure 1 is a perspective viewof a harrow-tooth and its supporting-bar constructed in accordance with my invention. Fig. 2 is atop plan View of the bar, showing the upper and lower tooth-receiving openings in full and broken lines. Fig. 3 is a horizontal section through the tooth and bar looking down upon the lower flange of the bar.

Referring now more particularly to the drawings, the numeral 1 represents a harrowtooth support consisting, preferably, of a. channeled or U-shaped bar, the upper and lower flanges 2 and 3 of which are formed with openings 4 and 5 to receive the harrowtooth 6;

The barrow-tooth 6 is of angular form in cross-section, preferably being made rectangular, and is adapted to be passed down through the openingset and 5, which are correspondingly shaped. The upper opening 4. is formed in the top flange 2 of the bar, with itssides arranged substantially at an angle of forty-five degrees to the longitudinal axis of the bar, while the opening 5 in the lower flange 3 is disposed so that its sides are arranged at an angle of about forty-three de grees to the longitudinal axis of the bar, so that the two openings are out of vertical coaxial alinement. By this construction the corner portions of the two openings are set at a slight angle to each other, so that when a barrow-tooth is forced down thereinto from above the angular disposition of the lower opening relative to the upper opening will cause the tooth to be turned or twisted, thus bringing its corners at an angleto the side walls of the upper opening 4, thus locking it firmly in position against casual displacement, while permitting it to be forced out of the openings under the blow of a hammer upon its pointed end to permit of the said pointed end of the tooth being conveniently sharpened whenever required. In order to facilitate the turning or twisting action of the tooth when inserted in the openings and at the same time to form a more secure locking connection between the tooth and the supporting-bar, I provide the openings with notches or enlargements 4' and 5' at their corners, which notches or enlargements are adapted to receive the corner angles of the tooth, so that the adjacent walls of the sides of the openings will form abutting shoulders or stops to prevent the tooth from having any rotary or turning movement, thereby preventing the tooth from casually turning back to the position occupied when it was inserted in the openings and becoming loosened or displaced. It will thus be seen that by disposing the two openings at an angle toeach other the turning or twisting action of the tooth produced when it is inserted therein causes the tooth to be locked firmly to the two flanges, so as to preventits displacement under all ordinary conditions of use.

From the foregoing description, taken in connection with the accompanying drawings, the construction, mode of operation, and advantages of the invention will be readily understood without requiring an extended explanation.

Various changes in the form, proportion, and details of construction may be made within the scope of the invention without departing from the spirit or sacrificing any of the advantages thereof.

channeled bar, the upper and lower flanges of which are provided with rectangular openings arranged at an angle to each other and adapted to eifect a turning action of the tooth when it is inserted therein, substantiallyas set forth.

4. A harroW-tooth support comprising a channeled bar, the upper and lower flanges of which are provided with rectangular openings to receive a correspondingly shaped tooth, said openings being disposed at an angle to each other and provided at their corners with notches, substantially as set forth. 5. A barrow-tooth support having upper and lower tooth-supporting members provided with openings set at an angle to each other and adapted to receive an angular tooth, substantially as and for the purpose set forth.

6. The combination with a barrow-tooth support having upper and lower tooth-supporting members provided with rectangular openings, of a rectangular tooth extending through said apertures andtwisted' at that portion of its length lying between the upper and lower tooth-supporting members, substantially as set forth.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

GEORGE E. BLAINE.

Witnesses:

BEN. L. HOWENSTINE, W. O. DIMooK. 

